Fair Value Measurements - Impaired Loans Remeasured and Reported at Fair Value of Underlying Collateral (Detail) - USD ($) $ in Thousands	Jun. 30, 2026	Jun. 30, 2025
Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying value before allocations	$ 61,352	$ 6,691
Specific (allocations) reversals of prior allocations	(2,191)	(528)
Fair value	59,161	6,163
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying value before allocations	7,401	15,830
Specific (allocations) reversals of prior allocations	(771)	(1,921)
Fair value	$ 6,630	$ 13,909